Insecticide



Patented Jan. 26, 1932 UNITED STATES PATENT OFFICE KARL MARX AND HANS VIIEISCHE, F DESSAU IN ANHEIM, GERMANY, ASSIGNORS TO WINTHROP CHEMICAL COMPANY, INC, 01 NEW YORK, N. Y., A CORPORATION OF INSECTICIDE No Drawing. Application filed July. 5, 1928, Serial No. 290,696, and in Germany Kay 9, 1928.

This invention relates to improved insecticonstituent ar-alpha-te'trahydro naphthol cides and is based on the observation that the ethyl ether.

In testimony whereof, we afix our signaethers derived from tetrahydronaphthol and the derivatives and'substitution products of 5 these ethers are extraordinarily active insecticides. Individual insecticides according-to this invention are, for example, ar-u-te'trahydronaphtholmethyl ether, ar-a-tetrahydronaphtholethyl ether, ar-B-tetrahydronaphtholmethyl ether and ar-B-tetrahydronaphtholethyl ether. They may be used without being mixed with other insecticides or in adtures.

mixture with synthetic or natural insecticides,

for example pyrethrum, or with extracts of.

such natural insecticides, with diluents or with vehicles. They may be applied in any desired manner,- as dusting powders or by spraying in form'of a solution or emulsion. By addition of viscous oils, for example parafiine oil, the finely sprayed preparation remains for a long time suspended in the air.

The following examples illustrate the invention: f

Example 1.= '-12 ccm. ar-B-tetrahydronaphtholmethyl ether are sprayed per 1 ohm. of a room infected by flies. That is suflicient to kill all the flies in a ver short time.

Example 2.5 parts 0 ar-a-tetrahydro na htholethyl ether'are dissolved in 5 parts an of utyl alcohol. 15 parts of an emulsifying agent are added, for instance a solution of 50 per cent. strength of the sodium salt of dibutylnaphthalene sulfonic acid. The mixture is then diluted to 100 parts with water.

A solution of 2 per cent. strength of this stock preparation yields an excellent spraying agent. I

What we claim is:

1. An insecticide containing as an activ constituent an aliphatic ether of an ar-tetrahydro naphthol.

2. An insecticide containin constituent ar beta tetrahy 5 methyl ether.

3. An insecticide containing as an active as an active naphthol KARL MARX. HANS WESCHE. 

